You may or may not have heard this yet, but why don't you enter a profile on yourself and these questions would be a lot easier for all of us to help you out on...........
That being said, there are a million balls that you could choose from that are stronger than the Sling Blade..........
What are you looking for besides pin-action ?!?! Arc, flip, synthetic lanes, wood, your speed, your style, etc, etc.............
P.S. ... not being harsh, just trying to help,...honestly
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JEFFRebuilding my game one mid-500 series at a time !!